I was trying to render this two smokes being generated by following particles along a path determined by a force, I already applied all transforms for both domain and emitters and it still renders like this. 
The last thing I tried, before posting, was to change density in hopes it was going to become more soft but it stills renders like its.
The smoke is emitted from a cube and I dont know if this changed anything but right know I just truly dont know how to fix this blocky look.
[![Render of the smoke in Cycles][1]][1]


  [1]: https://i.sstatic.net/2ESWM.jpg

Also, here is the blend file, I cleared the scene and just left the particles there.
[<img src="https://blend-exchange.giantcowfilms.com/embedImage.png?bid=MyqrBJ5d" />](https://blend-exchange.giantcowfilms.com/b/MyqrBJ5d/)